IGCSE O Level Biology MCQs – Mock Test 80

Heart: O Level Biology MCQ with Answers PDF Download – Test 80

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Free Heart: O Level Biology Study App Download (iOS & Android): "Of the total body mass, the heart weighs"; MCQ with answers: 0.0049, 0.0039, 0.0069, and 0.0059. Practice Transport in Mammals Questions and Answers, Google e-Book to download free chapter for biology structured learning.

Heart: O Level Biology MCQ – Mock Test 80 PDF Download

MCQ 396: Of the total body mass, the heart weighs:

0.0039
0.0049
0.0059
0.0069

MCQ 397: In plants, epicalyx in clitoria is:

absent
may be 2
may be 4
more than 4

MCQ 398: The disease AIDS stands for:

Acquired Iodine Deficiency Syndrome
Acquired Inherited Defective Syndrome
Acquired Immune Deficiency Syndrome
Acquired Immune Deflated Sensations

MCQ 399: Prothrombin helps in:

fighting against diseases
giving red color to the blood
blood clotting
hormones regulations

MCQ 400: In guard cells, Potassium ions (K⁺) combined with sugars lead to:

lower the water potential in guard cells
increase the water potential in guard cells
become turgid
increased temperature of guard cells

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